add -version, and a Makefile

.travis.yml

@@ -16,6 +16,7 @@ before_install:
     - go get golang.org/x/tools/cmd/vet
     - go get github.com/golang/lint/golint
     - go get golang.org/x/tools/cmd/cover
+    - go get -v
 
 script:
     - go vet -x ./...

Makefile

@@ -0,0 +1,50 @@
+bin = pipethis
+build = $(shell git describe --tags)-$(shell go env GOOS)-$(shell go env GOARCH)
+goversion = $(word 3, $(shell go version))
+dist = $(bin)-$(build).tar.bz2
+
+all: test build
+
+.PHONY: test
+test: deps lint 
+	@go get github.com/stretchr/testify/assert
+	@go test -cover -race ./...
+
+.PHONY: build
+build: deps
+	go build -o $(bin) -ldflags "-w -X main.bin=$(bin) -X main.build=$(build) -X main.builder=$(goversion)"
+
+.PHONY: clean
+clean: dist-clean
+# go clean -r hits a bunch of the stdlib, so we go nuclear!
+	go clean -i
+	rm -rf $(GOPATH)/pkg/*
+	rm -f $(bin)*
+
+.PHONY: dist
+dist: build
+	tar -jcf $(dist) $(bin)
+	gpg --detach-sign --armor --output $(dist).sig $(dist)
+
+.PHONY: dist-clean
+dist-clean:
+	rm -f $(dist)*
+
+.PHONY: lint
+lint:
+	@go get github.com/golang/lint/golint
+	@go fmt ./...
+	@go vet ./...
+	@golint ./...
+
+.PHONY: deps
+deps:
+	@go get -v
+
+.PHONY: watch
+watch:
+	@while true; do \
+		make test; \
+		inotifywait -qqre modify,create,delete,move .; \
+		echo watching for changes...; \
+	done

main.go

@@ -27,6 +27,12 @@ import (
 	"github.com/ellotheth/pipethis/lookup"
 )
 
+var (
+	bin     string
+	build   string
+	builder string
+)
+
 // ReadSeekCloser combines io.ReadSeeker and io.Closer, because I'm super lazy
 type ReadSeekCloser interface {
 	io.ReadSeeker
@@ -50,9 +56,15 @@ func main() {
 		noVerify    = flag.Bool("no-verify", false, "Don't verify the author or signature")
 		sigSource   = flag.String("signature", "", `Detached signature to verify. (default "<script location>.sig")`)
 		serviceName = flag.String("lookup-with", "keybase", "Key lookup service to use. Could be 'keybase' or 'local'.")
+		version     = flag.Bool("version", false, "Print the pipethis version information and exit")
 	)
 	flag.Parse()
 
+	if *version {
+		log.Println(bin, build, "("+builder+")")
+		return
+	}
+
 	// download the script, store it someplace temporary
 	script, err := NewScript(flag.Arg(0))
 	if err != nil {